52 / 125

10-30

surface-activity density

URNurn:iso:std:iso:80000:-10:ed-2:en:item:10-30

https://metanorma.github.io/isq-smart/quantities/part-10/t10-30
urn:iso:std:iso:80000:-10:ed-2:en:item:10-30

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-10:ed-2:en:item:10-30

IEC

urn:iec:std:iec:80000-10:2019:::item:10-30

Designations

ENsurface-activity density

FRactivité surfacique

Symbol

a_{S}

Notation systems

Rendered

a_{S}

AsciiMath

a_"S"

LaTeX

a_{\text{S}}

Definition

quotient of the activity $A$ (activity) of a sample and the total area $S$ (ISO 80000-3: Space and time) of the surface of that sample:

a_{S} = A / S

quotient de l'activité $A$ (activity) d'un échantillon par l'aire (ISO 80000-3: Space and time) totale $S$ de la surface de cet échantillon:

a_{S} = A / S

Units

B \frac{q}{m^{2}}

becquerel per square metre

View related quantities →

m^{- 2} \cdot s^{- 1}

per square metre second

View related quantities →

Notes

This value is usually defined for flat sources, where $S$ corresponds to the total area of surface of one side of the source.

Cette grandeur est habituellement définie pour des sources planes, où $S$ correspond à l'aire totale de la surface d'un côté de la source.

Concept HierarchyPendrill (2024)

L⁻² T⁻¹L⁻² T⁻¹ quantitiesLevel 0 · Kind

Broader concepts

◇ L⁻² T⁻¹ quantities

Characterizes

● source

Ontology
isq:Quantity smart:TermEntry

Class Hierarchy

smart:Entity smart:TermEntryisq:Quantity

A physical quantity as defined in ISO/IEC 80000, with associated symbols, definitions, and units of measurement.

Instance IRI

isq:t10-30

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	10-30
skosxl:prefLabel	"surface-activity density"@en
skosxl:altLabel	"a_"S""@en
skos:definition	quotient of the activity stem:[A] (<<t10-27>>) of a sample and the total area stem:[S] (<<iso80000-3>>) of the surface o…
skos:note	This value is usually defined for flat sources, where stem:[S] corresponds to the total area of surface of one side of t…
isq:hasUnit	Bq/m^2 (becquerel per square metre)m^(-2)*s^(-1) (per square metre second)
isq:hasDimension	isq:Dimension
smart:hasBindingnessType	bindingness-type:normative
dcterms:isPartOf	isq:part-10

Related Entities

isq:QuantityShape isq:part-10 isq:Unit isq:Dimension isq:hasDimension smart:TermEntry